# CVE-2025-47808: Null dereference in n/a

> A NULL pointer dereference in GStreamer's subparse plugin allows attackers to cause a denial of service via a crafted subtitle file.

- **Severity:** Medium 5.6 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Aug 2025
- **Updated:** 7 Aug 2025
- **Also known as:** ALPINE-CVE-2025-47808, AZL-66177, AZL-66192, BELL-CVE-2025-47808, DEBIAN-CVE-2025-47808, GHSA-qpmm-4hhq-c2qc, UBUNTU-CVE-2025-47808

## What is CVE-2025-47808?

CVE-2025-47808 is a medium-severity vulnerability in Gstreamer Gstreamer, published on 7 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In GStreamer through 1.26.1, the subparse plugin's tmplayer_parse_line function may dereference a NULL pointer while parsing a subtitle file, leading to a crash.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2025-47808?

It affects 1 product.


Products: Gstreamer Gstreamer.

## How do I fix CVE-2025-47808?

Upgrade to a fixed version.

## Is CVE-2025-47808 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-47808 exists.

## Other vulnerabilities in Gstreamer Gstreamer

- [CVE-2026-3083](https://insights.sbomify.com/CVE-2026-3083/): GStreamer rtpqdm2depay Out-Of-Bounds Write Remote Code Execution Vulnerability (high 8.8)
- [CVE-2026-3085](https://insights.sbomify.com/CVE-2026-3085/): GStreamer rtpqdm2depay Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-37328](https://insights.sbomify.com/CVE-2023-37328/): GStreamer PGS File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-37329](https://insights.sbomify.com/CVE-2023-37329/): GStreamer SRT File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-38103](https://insights.sbomify.com/CVE-2023-38103/): GStreamer RealMedia File Parsing Integer Overflow Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-47808 and fix it if it is affected.

What it is: CVE-2025-47808 is a medium-severity vulnerability in Gstreamer Gstreamer, published on 7 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-47808 exists.

Affected product: Gstreamer Gstreamer. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-47808/ (Markdown: https://insights.sbomify.com/CVE-2025-47808/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-47808
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-47808
- OSV: https://osv.dev/vulnerability/CVE-2025-47808

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-47808/
Summaries are generated and may contain mistakes; the official description above is the record.